3881506 has 4 divisors (see below), whose sum is σ = 5822262. Its totient is φ = 1940752.

The previous prime is 3881467. The next prime is 3881509. The reversal of 3881506 is 6051883.

3881506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3404025 + 477481 = 1845^2 + 691^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3881509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970375 + ... + 970378.

Almost surely, 2^3881506 is an apocalyptic number.

3881506 is a deficient number, since it is larger than the sum of its proper divisors (1940756).

3881506 is a wasteful number, since it uses less digits than its factorization.

3881506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940755.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 3881506 is about 1970.1538011028. The cubic root of 3881506 is about 157.1568880821.

The spelling of 3881506 in words is "three million, eight hundred eighty-one thousand, five hundred six".